JP2001032165A - Needle punching device for fiber web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject device, which can greatly increase length of the needle board in the fiber web passing direction, without causing adverse effects on the structure. SOLUTION: This needle punching device includes a needle beam 6 holding at least one needle board 1, which can be driven to reciprocate by an eccentric wheel driver 11 via pressing rods 7 and 8 guided in such a way that it can move in the axial direction. In this device, the needle beam 6 supports two rows of the pressing rods 7 and 8 which are installed in front and in the rear in the fiber web passing direction at an interval and connected to a lateral beam 9, and the eccentric wheel driver 11 drives the lateral beam 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fiber web needle punch in which a needle beam holding at least one needle board can be reciprocated by an eccentric drive via an axially guided push rod. Related to the device.

[0002]

BACKGROUND OF THE INVENTION At a given frequency of reciprocation of a needle beam in a needle punching device, the piercing density depends on the one hand on the number of needles of the needle board used and on the other hand on the feed speed of the fiber web to be needle punched. Therefore, at a predetermined piercing density, the feed speed of the fiber web and hence the output of the needle punching device can be increased by increasing the number of needles successively passing in the fiber web passing direction. However, the support of the needle beam on the two push rods provided in one row perpendicular to the fiber web passing direction and movable in the axial direction and reciprocally driven through the eccentric wheel driving device is provided in the fiber web passing direction. The loading of the eccentric needle board with respect to the direction of travel of the fiber web causes a tilting moment of the needle beam about the coupling axis at the point of action of the push rod on the needle beam, so as to prevent an increase in the measured length of the needle board. With the need to limit this tilting moment to an acceptable level, there is a requirement for a limited length of the needle board in the direction of fiber web passage. Therefore, in order to increase the output of the needle punching machine, there is no other way than to connect two needle punching devices each having one needle board in front and back, and the construction cost increases accordingly. Further, in a needle punching apparatus for obtaining a surface structure on which a pattern of a fiber web can be formed, the length of the needle board in the direction in which the fiber web passes restricts a possible shape of the pattern. This is because this pattern relates to the available board area for the needle distribution. However, limitations on the pattern configuration are not circumvented by providing a subsequent needle board.

[0003] 2 provided before and after in the fiber web passing direction
In order to allow one needle board to reciprocate together in both the piercing direction and the fiber web passing direction, the needle beams of both needle boards are provided on a common carrier, and two eccentric wheel shafts rotating in opposite directions are provided. It is already known to support the carrier as a four-bar mechanism via a connecting rod (EP-A-0 892 102), but this known structure has two needle beams, each having one needle beam. Assume one needle board.

[0004]

SUMMARY OF THE INVENTION The object underlying the present invention is therefore the object of the invention so that the length of the needle board in the direction of passage of the fiber web can be significantly increased without having to fear a detrimental effect on the structure. The first object of the present invention is to provide a fiber web needle punching device.

[0005]

In accordance with the present invention, there is provided, in accordance with the invention, two rows of needle beams which are provided one behind the other at intervals in the direction of passage of the fiber web and are connected by cross beams. Attached to the bar, the eccentric drive acts on the cross beam.

Since the needle beam is not mounted on a single row of push rods as in the prior art, but is mounted on two rows of push rods provided at intervals in the direction in which the fiber web passes, a rotational moment acting on the needle board is provided. Can be easily led out to the push rod via the needle beam. This is because the push rods provided at a distance from each other in the direction in which the fiber web passes and in the direction perpendicular thereto,
This is because when the needle board receives a rotational moment, it can receive particularly tension and compression. As a result, the board size in the fiber web passing direction can be more than twice as large as that of the comparable needle board. It can be replaced by a single needle punching device with a correspondingly long needle board, but with all the advantages derived from the extension of the board in the direction of passage of the fibrous web. A prerequisite for this is that the push rods are moved simultaneously, which is ensured by connecting the push rods of the row via cross beams on which the eccentric drive acts.

[0007] Since the cross beam can be connected to the push bar so as to resist bending, the cross beam is guided via the push bar itself. Advantageous tolerance compensation is provided because the cross beam is movably supported parallel to the push bar and the push bar is pivotally mounted on the cross beam, which provides another possible configuration.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated needle punching device for a fiber web comprises a needle board 1 having needles 2 according to FIG.
The needle 2 penetrates the fiber web guided between the bed plate 3 and the stripper plate 4 and fed through the device in the direction of arrow 5. The needle board 1 is fastened to a needle beam 6, which extends perpendicularly to a fiber web passing direction 5.
It is mounted via push rods 7 and 8 provided in pairs in rows. These push rods 7 and 8 are connected via a cross beam 9, so that the push rods 7 and 8 are attached to the cross beam 9 so as to withstand bending. In order to drive the push rods 7 and 8 guided movably in the axial direction into the slide guide device 10, an eccentric drive device 11 composed of two eccentric shafts 12 rotating in opposite directions is used, and the connection of the eccentric shafts 12 is used. Stick 13
Is connected to the connecting piece 14. The connecting piece 14 is the pivot 1
Acting on the cross beams 9 of the push rods 7 and 8 via 5, the push rods 7 and 8 are reciprocated in the slide guide device 10 via the eccentric drive 11, and the needle 2 is periodically moved to the fiber web. During the release of the needle 2 from the needle 2, the fiber web is fed little by little in the fiber web passing direction 5 via a continuous withdrawal device.

In general, an advantageous rotational moment support for the needle beam 6 is provided by the two rows of push rods 7 and 8 formed of two push rods 7 or 8, respectively. A precondition is given that the board 1 can be realized with a relatively large length in the fiber web passing direction 5. This is needle board 1
Means that the output of the needle punching device can be increased due to an increase in the feed rate without accepting a decrease in the piercing density. However, the greater length of the needle board 1 in the fiber web passing direction 5 not only results in increased power, but also due to the larger board area available for needle distribution, Enables greater diversity.

The embodiment according to FIG. 2 differs from the structure according to FIG. 1 only in the guidance of the cross beam 9 connecting the push rods 7 and 8. Since the cross beam 9 according to FIG. 2 alone is movably supported on a guide bar 16 extending parallel to the push bars 7 and 8, the push bars 7 and 8 are pivotally connected to the cross beam 9 via a shaft 17. And, in particular, the lateral forces acting on the cross beam 9 can be directly derived via the guide rods 16, so that an advantageous guiding and supporting state is ensured.

[Brief description of the drawings]

FIG. 1 is a partially cut-away schematic side view of a fiber web needle punching device according to the present invention.

FIG. 2 is a schematic side view corresponding to FIG. 1 of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Needle board 2 Needle 5 Fiber web passing direction 6 Needle beam 7, 8 Push rod 9 Cross beam 11 Eccentric wheel drive device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Monica Fehrer Leonding Vuek Scheidel Schyutläster, Austria 15 (72) Inventor Hannes Phum Alberndorf Schyuv Mvek 35, Austria, Aloys Inventor Erlinger Leonding Sienberggasse 5 Austria

Claims (3)

[Claims] 1. A needle punching device, wherein a needle beam holding at least one needle board comprises:
The needle beam (6) can be reciprocated by an eccentric drive via a push rod guided in the axial direction, in which needle beams (6) are provided at the front and back at intervals in the fiber web passing direction (5) and cross beams (6). Eccentric wheel drive (11) mounted on two rows of push rods (7, 8) joined by 9)
Acts on the cross beam (9), the fiber web needle punching device. 2. The device according to claim 1, wherein the cross beam is connected to the push rod so as to resist bending. 3. The cross beam (9) is supported so as to be movable in parallel to the push bar (7, 8), and the push bar (7, 8) is pivotally mounted on the cross beam (9). The apparatus of claim 1, wherein: